Find the power of a concave lens of focal length 2 m.


A concave lens is a type of lens that diverges a straight light beam from the source to a diminished, upright, virtual image known as a concave lens. It can form both real and virtual images.

According to the sign convention, the focal length of a concave lens is always negative.Given parameter

Focal length of concave lens (f) = 2 m

Power of lens can be calculated using the formula

P= 1/f

P = 1/(-2)

P = – 0.5D

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